Answers

2014-08-27T22:22:31+05:30
1).   4x-3y+5 = 4×1-3×2+5 = 4-6+5 = 3
2).    x^{2} + y^{2} =  1^{2} + 2^{2} = 1+4 =5
3).   xy+3y-9 = 1*2+3*2-9=2+6-9=-1
0
2014-08-27T23:00:24+05:30
1) 4 * 1 - 3 * 2 + 5
= 4 - 6 + 5
= 3
2) 1² + 2²
= 5
3) 1 * 2 + 3 * 2 - 9
2 + 6 - 9
-1
1 5 1